Preparation method of Waspalloy spherical powder for additive manufacturing

A spherical powder, additive manufacturing technology, applied in additive processing, metal processing equipment, transportation and packaging, etc., can solve the problems of production difficulty and procurement cost increase, improve production efficiency, reduce satellite powder and hollow powder. Formation, high sphericity effect

Inactive Publication Date: 2017-05-10
SINO EURO MATERIALS TECH OF XIAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process uses Waspalloy wire with a diameter of less than 5mm as the raw material, which significantly increases the production difficulty and procurement cost of raw materials.

Method used

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  • Preparation method of Waspalloy spherical powder for additive manufacturing
  • Preparation method of Waspalloy spherical powder for additive manufacturing
  • Preparation method of Waspalloy spherical powder for additive manufacturing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: A preparation method of Waspalloy spherical powder for additive manufacturing, including the following steps:

[0033] The mass percentages of the main elements used are: Cr-18.3%, Co-12.5%, Mo-3.8%, Al-1.2%, Ti-2.8%, Fe-0.5%, Mn-0.03%, S-0.007%, P- 0.006%, Si-0.08%, Cu-0.03%, B-0.004%, Zr-0.03%, C-0.003%, Ni-balance balance, put the raw materials in a vacuum induction furnace with a vacuum of 0.1 Pa for one time Smelting; remove the surface oxide scale of the primary smelting, and carry out the second vacuum consumable remelting, and the vacuum degree is 0.05 Pa to obtain the Waspalloy master alloy secondary smelting ingot blank with a relative density of 95%;

[0034] Waspalloy alloy rods with a density of 99.6% were obtained by isothermal free forging, and processed by lathes and precision CNC lathes into Waspalloy alloy rods with a diameter of 75mm and a length of 850mm;

[0035] Place the Waspalloy alloy electrode rod in the electrode rod installation chamber ...

Embodiment 2

[0039] Example 2: Preparation of Waspalloy alloy spherical powder

[0040] The mass ratio of the main elements used is: Cr-19.8%, Co-13.5%, Mo-4.4%, Al-1.4%, Ti-2.98%, Fe-1.3%, Mn-0.6%, S-0.011%, P -0.0010%, Si-0.12%, Cu-0.07%, B-0.007%, Zr-0.05%, C-0.006%, Ni-balance balance, the raw materials are placed in a vacuum induction furnace with a vacuum of 0.05 Pa Primary smelting; remove the surface oxide scale of the primary smelting, and carry out the second vacuum consumable remelting. The vacuum degree is 0.01Pa to obtain the Waspalloy master alloy secondary smelting ingot blank with a relative density of 91%;

[0041] The Waspalloy master alloy is re-smelted ingot-shaped billet, and the Waspalloy alloy rod with a density of 99.5% is obtained by isothermal free forging, and processed into a Waspalloy alloy electrode rod with a diameter of 85mm and a length of 500mm;

[0042] Place the alloy electrode in the electrode rod installation chamber 2 and evacuate the inert protective gas a...

Embodiment 3

[0047] The mass ratio of the main elements used is: Cr-20.7%, Co-14.9%, Mo-4.7%, Al-1.6%, Ti-3.16%, Fe-1.8%, Mn-0.9%, S-0.015%, P -0.0013%, Si-0.14%, Cu-0.10%, B-0.009%, Zr-0.08%, C-0.009%, Ni-balance balance, put the raw materials in a vacuum induction furnace with a vacuum of 0.05 Pa Primary smelting; remove the surface oxide scale of the primary smelting, and carry out the second vacuum consumable remelting. The vacuum degree is 0.01Pa to obtain the Waspalloy master alloy with a relative density of 91%.

[0048] The Waspalloy master alloy is re-smelted ingot-shaped billet, and the Waspalloy alloy bar with a density of 99.5% is obtained by isothermal free forging, and processed into a Waspalloy alloy electrode bar with a diameter of 10mm and a length of 100mm;

[0049] Place the alloy electrode in the electrode rod installation chamber 2, and evacuate the inert protective gas atomization chamber 1 until the vacuum degree of the equipment reaches 9×10 -3 When Pa is filled with arg...

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Abstract

A preparation method of Waspalloy spherical powder for additive manufacturing includes the steps of conducting alloy component compounding according to AMS 5706 standards and subjecting master ingots to vacuum melting twice; producing the master ingots into alloy electrode bars by means of forging and machining; subjecting an atomizing unit to pre-vacuum-pumping treatment, and feeding the atomizing unit with mixed inert protective gas; feeding the electrode bars into an atomizing chamber by a feeding system, heating electrode bar end faces by a plasma torch, preparing metal liquid droplets under the centrifugal action of a rotating electrode, and making the metal liquid droplets form spherical metal powder by flash setting; using a powder collecting device comprising an electrostatic separation component for removing inclusions of the spherical metal powder and collecting purified powder. The preparation method has the advantages of high production efficiency, high batch stability and high -270-mesh powder yield and can be used for easily preparing the Waspalloy spherical powder high in purity, sphericity and fluidity.

Description

Technical field [0001] The invention belongs to the technical field of metal and alloy powder preparation, and particularly relates to a preparation method of Waspalloy spherical powder for additive manufacturing. Background technique [0002] Waspalloy alloy is a precipitation-strengthened superalloy with Cr, Co, and Mo as the main strengthening elements. Below 650℃, Waspalloy alloy has the properties of durability, fatigue resistance, oxidation resistance and chloride ion stress corrosion cracking. Mainly used in structural components such as gas turbine engines, nuclear power equipment, aerospace engines and nuclear reactors. [0003] In recent years, with the continuous development of metal additive manufacturing technologies such as laser powder coating (SLM), laser powder feeding (DED), electron beam powder coating (EBM), Waspalloy has gradually been developed from the traditional forged superalloy to a new type of powder In order to improve the performance of high-temperatu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/14B33Y70/00C22C19/05
CPCB22F9/14B33Y70/00B22F2999/00C22C19/056C22C19/055B22F1/065B22F2201/11B22F2201/12B22F2202/17
Inventor 赵霄昊王琦张梅徐伟王庆相梁书锦张平祥
Owner SINO EURO MATERIALS TECH OF XIAN CO LTD
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